def show_cumulative_phase_demand_json(phase):
session = DBSession()
conn = session.connection()
sql = text('''
select nodes.id,
nodetypes.name,
nodes.weight,
st_asgeojson(nodes.point),
edges.distance
from nodes, edges, nodetypes, phase_ancestors
where nodes.scenario_id = :sc_id and
nodes.phase_id = phase_ancestors.ancestor_phase_id and
phase_ancestors.phase_id = :ph_id and
edges.scenario_id = phase_ancestors.scenario_id and
edges.phase_id = phase_ancestors.phase_id and
nodes.id = edges.from_node_id and
nodes.node_type_id = nodetypes.id and
nodetypes.name='demand'
''')
rset = conn.execute(sql, sc_id=phase.scenario_id, ph_id=phase.id).fetchall()
feats = [
{
'type': 'Feature',
'geometry': simplejson.loads(feat[3]),
'properties': {
'id':feat[0],
'type':feat[1],
'weight':feat[2],
'distance': feat[4]
}
} for feat in rset
]
return json_response({'type': 'FeatureCollection', 'features': feats })
def create_scenario(request):
"""
Bulk load the nodes from the demand and supply csv's
"""
if(request.method=='POST'):
session = DBSession()
dbapi_conn = session.connection().connection
sc = phase = None
try:
demand_type = get_node_type('demand', session)
supply_type = get_node_type('supply', session)
name = request.POST['name']
# make sure that we have a name
assert len(name) != 0
sc = Scenario(name)
session.add(sc)
session.flush()
# add the root phase to the scenario
phase = Phase(sc)
session.add(phase)
session.flush()
demand_file = request.POST['demand-csv']
supply_file = request.POST['supply-csv']
tmp_demand_file = os.path.join(
request.registry.settings['next.temporary_folder'],
demand_file.filename
)
tmp_supply_file = os.path.join(
request.registry.settings['next.temporary_folder'],
supply_file.filename
)
write_tmp_file(demand_file, tmp_demand_file)
write_tmp_file(supply_file, tmp_supply_file)
in_demand_stream = open(tmp_demand_file, 'rU')
in_supply_stream = open(tmp_supply_file, 'rU')
import_nodes(dbapi_conn, in_demand_stream,
demand_type.id, sc.id, phase.id)
import_nodes(dbapi_conn, in_supply_stream,
supply_type.id, sc.id, phase.id)
except Exception as error:
raise(error)
# send the user to the run scenario page right now
# at this point, we should have the scenario/phase,
# so create the edges
# session.commit()
phase.create_edges()
return HTTPFound(
location=request.route_url('show-phase', id=sc.id, phase_id=phase.id))
elif request.method == 'GET':
return {}
else:
raise HTTPForbidden()